| Name and Model Number | Lord's Calculator by Elliott Brothers |
| Country of Origin | England (London) |
| Date of Manufacture | unknown |
| Front Scales | D [ C, B ] A |
| Back Scales | none |
| Scale Length | 6.5" |
| Type of Rule | Watch Type |
| Construction | Metal case with glass front, solid back, and fixed (D, A) and moveable (C, B) metal scales. Main stem turns outer moveable scale C. Side stem turns inner moveable scale B. |
| Area of Use | Other |
| Comment | For basic math and textile calculations.
Fixed Inner Scale: A scale - Reeds and Picks from 100-10 logarithmic. |
| Rarity | RR |
| Donor | Collection of Dr. Paul J. Tarantolo Jr. |
| Match Number | 55 |
| Thumbnail (Click Picture for Details) |  |
| In conjunction with our 'donors' we assign a rarity rating to each item, based on the system devised by Herman van Herwijnen |
| (1929 - 2004), renowned Dutch collector, author, and creator of Herman's Archive, a collection of 5,000 slide rule images on CD. |
| • RR = Rare - 1 of 25 collectors has one; it may take a year to find an example in the marketplace. |
| • RRR = Very Rare - only a few known to collectors; may be several years before it comes up for sale. |
| • RRRR = Extremely Rare - a museum piece; unlikely that an example will come up for sale. |